官方开发文档模式二的地址：https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=6_5
pom文件的依赖：
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.wky</groupId> <artifactId>wechat</artifactId> <version>0.0.1-SNAPSHOT</version> <name>wechat</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--微信扫码支付所需要的依赖--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>net.sf.ezmorph</groupId> <artifactId>ezmorph</artifactId> <version>1.0.6</version> </dependency> <!--jsp--> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.2.3</version> <classifier>jdk15</classifier><!-- 指定jdk版本 --> </dependency> <dependency> <groupId>com.github.wxpay</groupId> <artifactId>wxpay-sdk</artifactId> <version>0.0.3</version> </dependency> <!-- fastjson--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.24</version> </dependency> <!-- gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-core</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.thoughtworks.xstream</groupId> <artifactId>xstream</artifactId> <version>1.4.4</version> </dependency> <dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>3.0</version> </dependency> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>org.jdom</groupId> <artifactId>jdom</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>com.orhanobut</groupId> <artifactId>logger</artifactId> <version>1.14</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.25</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.25</version> <scope>test</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.7.25</version> <scope>test</scope> </dependency> <!--屏蔽自带的tomcat--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>compile</scope> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.4</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
PayCommonUtil.java 微信支付常用方法
import java.text.SimpleDateFormat; import java.util.Date; import java.util.Iterator; import java.util.Map; import java.util.Set; import java.util.SortedMap; public class PayCommonUtil { /** * 是否签名正确,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。 * @return boolean */ public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) { StringBuffer sb = new StringBuffer(); Set es = packageParams.entrySet(); Iterator it = es.iterator(); while(it.hasNext()) { Map.Entry entry = (Map.Entry)it.next(); String k = (String)entry.getKey(); String v = (String)entry.getValue(); if(!"sign".equals(k) && null != v && !"".equals(v)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + API_KEY); //算出摘要 String mysign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toLowerCase(); String tenpaySign = ((String)packageParams.get("sign")).toLowerCase(); //System.out.println(tenpaySign + " " + mysign); return tenpaySign.equals(mysign); } /** * @author * @date 2016-4-22 * @Description：sign签名 * @param characterEncoding * 编码格式 * @param parameters * 请求参数 * @return */ public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) { StringBuffer sb = new StringBuffer(); Set es = packageParams.entrySet(); Iterator it = es.iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); String k = (String) entry.getKey(); String v = (String) entry.getValue(); if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + API_KEY); String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); return sign; } /** * @author * @date 2016-4-22 * @Description：将请求参数转换为xml格式的string * @param parameters * 请求参数 * @return */ public static String getRequestXml(SortedMap<Object, Object> parameters) { StringBuffer sb = new StringBuffer(); sb.append("<xml>"); Set es = parameters.entrySet(); Iterator it = es.iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); String k = (String) entry.getKey(); String v = (String) entry.getValue(); if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) { sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">"); } else { sb.append("<" + k + ">" + v + "</" + k + ">"); } } sb.append("</xml>"); return sb.toString(); } /** * 取出一个指定长度大小的随机正整数. * * @param length * int 设定所取出随机数的长度。length小于11 * @return int 返回生成的随机数。 */ public static int buildRandom(int length) { int num = 1; double random = Math.random(); if (random < 0.1) { random = random + 0.1; } for (int i = 0; i < length; i++) { num = num * 10; } return (int) ((random * num)); } /** * 获取当前时间 yyyyMMddHHmmss * * @return String */ public static String getCurrTime() { Date now = new Date(); SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss"); String s = outFormat.format(now); return s; } }
XMLUtil.java 将支付参数转换为xml格式
import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.jdom.Document; import org.jdom.Element; import org.jdom.JDOMException; import org.jdom.input.SAXBuilder; public class XMLUtil { /** * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。 * @param strxml * @return * @throws JDOMException * @throws IOException */ public static Map doXMLParse(String strxml) throws JDOMException, IOException { strxml = strxml.replaceFirst("encoding=".*"", "encoding="UTF-8""); if(null == strxml || "".equals(strxml)) { return null; } Map m = new HashMap(); InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8")); SAXBuilder builder = new SAXBuilder(); Document doc = builder.build(in); Element root = doc.getRootElement(); List list = root.getChildren(); Iterator it = list.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String k = e.getName(); String v = ""; List children = e.getChildren(); if(children.isEmpty()) { v = e.getTextNormalize(); } else { v = XMLUtil.getChildrenText(children); } m.put(k, v); } //关闭流 in.close(); return m; } /** * 获取子结点的xml * @param children * @return String */ public static String getChildrenText(List children) { StringBuffer sb = new StringBuffer(); if(!children.isEmpty()) { Iterator it = children.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String name = e.getName(); String value = e.getTextNormalize(); List list = e.getChildren(); sb.append("<" + name + ">"); if(!list.isEmpty()) { sb.append(XMLUtil.getChildrenText(list)); } sb.append(value); sb.append("</" + name + ">"); } } return sb.toString(); } }
HttpUtil.java 用http连接提交支付信息参数
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.URL; import java.net.URLConnection; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class HttpUtil { private static final Log logger = LogFactory.getLog("org.apache.catalina.tribes.MESSAGES" ); private final static int CONNECT_TIMEOUT = 5000; // in milliseconds private final static String DEFAULT_ENCODING = "UTF-8"; public static String postData(String urlStr, String data){ return postData(urlStr, data, null); } public static String postData(String urlStr, String data, String contentType){ BufferedReader reader = null; try { URL url = new URL(urlStr); URLConnection conn = url.openConnection(); conn.setDoOutput(true); conn.setConnectTimeout(CONNECT_TIMEOUT); conn.setReadTimeout(CONNECT_TIMEOUT); if(contentType != null) conn.setRequestProperty("content-type", contentType); OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING); if(data == null) data = ""; writer.write(data); writer.flush(); writer.close(); reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING)); System.out.println(reader.toString()); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line); sb.append(" "); } return sb.toString(); } catch (IOException e) { logger.error("Error connecting to " + urlStr + ": " + e.getMessage()); } finally { try { if (reader != null) reader.close(); } catch (IOException e) { } } return null; } }
MD5Util.java md5加密
private static String byteToHexString(byte b) { int n = b; if (n < 0) n += 256; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; } public static String MD5Encode(String origin, String charsetname) { String resultString = null; try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); if (charsetname == null || "".equals(charsetname)) resultString = byteArrayToHexString(md.digest(resultString .getBytes())); else resultString = byteArrayToHexString(md.digest(resultString .getBytes(charsetname))); } catch (Exception exception) { } return resultString; } private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; }
GetWeixinUrlUtil.java 获取订单生成的二维码URL
import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.Map; import java.util.SortedMap; import java.util.TreeMap; public class GetWeixinUrlUtil { //获取二维码url public static String weixin_pay(String ip, VcWeixinPay vcWeixinPay) throws Exception { // 账号信息 String appid = PayConfigUtil.APP_ID; // appid String mch_id = PayConfigUtil.MCH_ID; // 商户号 String key = PayConfigUtil.API_KEY; // key String currTime = PayCommonUtil.getCurrTime(); String strTime = currTime.substring(8, currTime.length()); String strRandom = PayCommonUtil.buildRandom(4) + ""; String nonce_str = strTime + strRandom; int order_price = 1; // 商品价格 注意：价格的单位是分 String body = "商品名称"; // 商品名称 String out_trade_no = PayCommonUtil.getCurrTime() + PayCommonUtil.buildRandom(4); // 商户订单号 // 获取发起电脑 ip String spbill_create_ip = ip; // 回调接口 String notify_url = PayConfigUtil.NOTIFY_URL; String trade_type = "NATIVE"; //交易类型 SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>(); packageParams.put("appid", appid); packageParams.put("mch_id", mch_id); packageParams.put("nonce_str", nonce_str); packageParams.put("body", body); packageParams.put("out_trade_no", out_trade_no); packageParams.put("total_fee", String.valueOf(order_price)); packageParams.put("spbill_create_ip", spbill_create_ip); packageParams.put("notify_url", notify_url); packageParams.put("trade_type", trade_type); //生成签名 String sign = PayCommonUtil.createSign("UTF-8", packageParams,key); packageParams.put("sign", sign); String requestXML = PayCommonUtil.getRequestXml(packageParams); System.out.println(requestXML); String resXml = HttpUtil.postData(PayConfigUtil.UFDODER_URL, requestXML); Map map = XMLUtil.doXMLParse(resXml); String urlCode = (String) map.get("code_url"); return urlCode; } // 特殊字符处理 public static String UrlEncode(String src) throws UnsupportedEncodingException { return URLEncoder.encode(src, "UTF-8").replace("+", "%20"); } }
PayConfigUtil.java 微信支付参数
import javax.servlet.http.HttpServletRequest; public class PayConfigUtil { public static final String APP_ID = "";//微信开发平台应用ID(公众号ID) public static final String MCH_ID = "";//商户号(商户号ID) public static final String API_KEY = "";//API key(商户号里面的) public static final String CREATE_IP = "";//发起支付的ip public static final String NOTIFY_URL = "";//回调地址 public static final String UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信统一下单接口 public static final String APP_SECRET = "";//应用对应的凭证(在公众号里面) //获取ip public static String getIP(HttpServletRequest request) { String ip = request.getRemoteAddr(); return ip; }
支付回调方法
public void weixin_notify(HttpServletRequest request,HttpServletResponse response) throws Exception { System.out.println("调用回调方法"); //读取参数 InputStream inputStream ; StringBuffer sb = new StringBuffer(); inputStream = request.getInputStream(); String s ; BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); while ((s = in.readLine()) != null){ sb.append(s); } in.close(); inputStream.close(); //解析xml成map Map<String, String> m = new HashMap<String, String>(); m = XMLUtil.doXMLParse(sb.toString()); //过滤空 设置 TreeMap SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>(); Iterator it = m.keySet().iterator(); while (it.hasNext()) { String parameter = (String) it.next(); String parameterValue = m.get(parameter); String v = ""; if(null != parameterValue) { v = parameterValue.trim(); } packageParams.put(parameter, v); } // 账号信息 String key = PayConfigUtil.API_KEY; // key logger.info(packageParams); //判断签名是否正确 if(PayCommonUtil.isTenpaySign("UTF-8", packageParams,key)) { //------------------------------ //处理业务开始 //------------------------------ String resXml = ""; if("SUCCESS".equals((String) packageParams.get("result_code"))){ // 这里是支付成功 //////////执行自己的业务逻辑//////////////// String mch_id = (String) packageParams.get("mch_id"); String openid = (String) packageParams.get("openid"); String is_subscribe = (String) packageParams.get("is_subscribe"); String out_trade_no = (String) packageParams.get("out_trade_no"); String total_fee = (String) packageParams.get("total_fee"); String cash_fee_s = (String) packageParams.get("cash_fee"); String cash_fee = String.valueOf(Integer.parseInt(cash_fee_s) / 100); String time_end = MctsUtils.numberDateToDate((String) packageParams.get("time_end")); String transaction_id = (String) packageParams.get("transaction_id"); //////////执行自己的业务逻辑（报存订单信息到数据库）//////////////// System.out.println("支付成功 ,处理业务成功"); logger.info("支付成功"); //通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了. resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>" + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> "; //------------------------------ //处理业务完毕 //------------------------------ //向微信服务器发送确认信息，若不发送，微信服务器会间隔不同的时间调用回调方法 BufferedOutputStream out = new BufferedOutputStream( response.getOutputStream()); out.write(resXml.getBytes()); out.flush(); out.close(); System.out.println("通知微信.异步确认成功"); } else { logger.info("支付失败,错误信息：" + packageParams.get("err_code")); resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> "; BufferedOutputStream out = new BufferedOutputStream( response.getOutputStream()); out.write(resXml.getBytes()); out.flush(); out.close(); System.out.println("执行回调函数失败"); } } else{ logger.info("通知签名验证失败"); } }
@RequestMapping(value="/image",method = RequestMethod.GET)
public void payWexin(@RequestParam String ip, HttpServletResponse response)throws Exception{
String url=GetWeixinUrlUtil.weixin_pay(ip);
GetWeixinUrlUtil.encodeQrcode(url,response);
根据GetWeixinUrlUtil.java获取到微信支付订单信息的二维码url，下载一个解析二维码的js插件（jquery.qrcode.min.js），把获取到二维码url在前端页面用jquery.qrcode.min.js解析，就能显示二维码了。
前端页面简略代码：
<script type="text/javascript" src="js/jquery.qrcode.min.js"></script> <script language="javascript"> $(function(){ var codeUrl = ${erWeiMa};//erWeiMa是后端传的二维码url $("#code").qrcode({ render: "canvas", //table方式 240, //宽度 height:240, //高度 text: codeUrl //任意内容 }); }); </script> <div id="code" style=" 240px;height: 240px;margin: 0px auto;"></div>